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Removing cylinder head cover - cylinder bank 4 - 6

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2005 Porsche 911, 2004 Porsche 911, 2003 Porsche 911, 2002 Porsche 911, and 2001 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the ground cable from the cylinder head. Unscrew 1 M8 hexagon-head bolt.
  2. Pull the 2 cable plugs off the oil pressure sensor.
  3. Remove the shield: Unscrew 2 M6 x 16 hexagon-head bolts. Pull out the shield to side.

    Fig 1  shows engine side 1 - 3 

    Fig 1: Removing Shield & Rear Muffler Holder
    G03100228Courtesy of PORSCHE OF NORTH AMERICA, INC.
  4. Remove the exhaust manifold. To do this, unscrew three M8 fastening nuts on the catalytic converter flange. Then unscrew six M8 screws from the cylinder head. If necessary, lever the exhaust manifold off the catalytic converter flange using a screwdriver.
    NOTE:
    • In order to avoid damage to cables or hoses, the engine must not be lowered more than 40 mm.
  5. Use a component jack to lower the engine by 30 - 40 mm. To do this, unscrew the two collar nuts (a/f 18) of the rear engine mounts and slowly lower the engine. Make sure that the hoses and cables are not damaged.
  6. Remove holder for rear muffler, -Item 2 in  Fig 1 .  Disconnect cable plugs of the ignition coils and of the magnetic hydraulic valves. Unscrew 4 hexagon-head bolts: top 2 M8 x 30, bottom 2 M8 x 25, then remove the holder in downward direction.
  7. Remove 3 ignition coils: Unscrew 6 M6 x 25 pan-head screws (hexagon socket a/f 5) and pull ignition coils out of spark-plug recess.
  8. Remove 2 holders and 2 covers for the magnetic hydraulic valves: Unscrew 4 M6 x 20 pan-head screws (hexagon socket a/f 5), remove the connection cable of the hydraulic valves from the sheetmetal bracket and remove the holders. Pull off 2 covers for the hydraulic valves.

    See Figures in  INSTALLING CYLINDER HEAD COVER - CYLINDER BANK 1 - 3   .

  9. Remove 2 magnetic hydraulic valves (camshaft and valve lift adjustment), paying attention to the installation position. Pull both valves carefully out of the bores.
    NOTE:
    • Pay attention to cleanliness without fail!
    CAUTION: When levering off the cylinder head cover, the cast lugs may break!
  10. Remove cylinder head cover. Repeat step No. 8 as with cylinder bank 1 - 3.
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